A battery and a drone
By using a combination of heat transfer and heat dissipation components in the drone battery, the problem of uneven temperature between cells is solved, achieving uniform temperature distribution and efficient heat dissipation of the cell module, reducing the risk of cell expansion, and improving the battery's environmental adaptability and heat dissipation efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU YUNSHENG INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-06-19
Smart Images
Figure CN224384316U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery thermal management technology, and in particular to a battery and a drone. Background Technology
[0002] Currently, drone batteries are typically composed of multiple stacked cells. During drone use, the drone's flight range increases with the battery's energy density; however, high-rate discharge causes a surge in heat within the cells. As the heat increases, the cells expand, primarily manifesting as a bulge in the central planar surface of the cell. Existing technology typically allows for a 10% expansion space between the cells to accommodate this expansion.
[0003] However, due to the gaps between the battery cells, air fills those spaces. Air has a low thermal conductivity, making it difficult for adjacent cells to transfer heat effectively. Therefore, in existing technologies, the temperature of cells located in the middle of the battery is typically higher than that of cells located at the edges, resulting in uneven temperature distribution among the cells and consequently poor heat dissipation efficiency. Utility Model Content
[0004] The purpose of this application is to provide a battery and a drone to improve the problem of uneven temperature between battery cells caused by cell expansion. The specific technical solution is as follows:
[0005] This application provides a battery, which includes: a battery casing, a cell module, and a heat dissipation assembly;
[0006] The battery cell module is disposed inside the battery casing and includes: a plurality of battery cells stacked sequentially; each battery cell has two first sides opposite each other along the thickness direction and two second sides opposite each other along the width direction;
[0007] The heat dissipation assembly includes a heat transfer element and a heat dissipation element; a first end of the heat transfer element is inserted between two adjacent battery cells at the middle position of the battery cell module; a second end of the heat transfer element is attached to a battery cell at the edge position of the battery cell module; the heat transfer element is used to transfer heat from the middle position of the battery cell module to the edge position.
[0008] The first side of the heat sink is attached to the battery housing, and at least a portion of the second side is attached to the heat transfer element, for transferring the heat of the cell module to the battery housing;
[0009] The battery casing is provided with a casing heat sink; the casing heat sink is positioned opposite to the heat sink and is fitted to the heat sink to transfer the heat from the heat sink to the external environment.
[0010] In some embodiments of this application, the heat transfer element has multiple heat transfer surfaces. A first heat transfer surface is inserted between the first side surfaces of two adjacent battery cells at the middle position of the battery cell module. A second heat transfer surface is attached to the first side surface of the battery cell at the edge position of the battery cell module. A third heat transfer surface is covered on the second side surface of the battery cell located between the first and second heat transfer surfaces. The first and second heat transfer surfaces are respectively connected to the two ends of the third heat transfer surface. The heat transfer element is used to transfer the heat of the battery cell at the middle position to the battery cell at the edge position.
[0011] In some embodiments of this application, the number of heat transfer elements is multiple, and the multiple heat transfer elements are staggered in the stacking direction.
[0012] In some embodiments of this application, the first heat transfer surface, the second heat transfer surface, and the third heat transfer surface form a C-shaped structure;
[0013] One of the heat transfer elements is disposed on the battery cell located from the top to the middle position in the battery cell module; the other heat transfer element is disposed on the battery cell located from the bottom to the middle position in the battery cell module;
[0014] The first heat transfer surfaces of the two heat transfer elements are inserted between the first side surfaces of two adjacent battery cells at the middle position;
[0015] The second heat transfer surfaces of the two heat transfer elements respectively cover the first side surfaces of the battery cell located at the top and bottom;
[0016] The third heat transfer surfaces of the two heat transfer elements respectively cover the opposite second sides of the plurality of battery cells.
[0017] In some embodiments of this application, the number of heat sinks is the same as the number of heat transfer elements, and they are arranged in a one-to-one correspondence with the heat transfer elements; a portion of the second side of each heat sink is attached to the third heat transfer surface, and another portion is attached to the second side of the battery cell that is not covered by the third heat transfer surface.
[0018] In some embodiments of this application, each of the heat transfer elements further comprises: at least one fourth heat transfer surface; the fourth heat transfer surface is located between the first heat transfer surface and the second heat transfer surface, connected to the third heat transfer surface, and extends into the space between adjacent battery cells.
[0019] In some embodiments of this application, a temperature sensor is provided between the battery cells; the temperature sensor is used to detect the temperature of the battery cell module.
[0020] In some embodiments of this application, the battery housing includes a housing body and a top cover. The housing body has a receiving cavity and an opening. The battery cell module and the heat dissipation assembly are installed in the receiving cavity through the opening. The top cover is detachably fitted onto the opening of the housing body, and a waterproof gasket is provided at the connection between the housing body and the top cover.
[0021] In some embodiments of this application, the heat transfer element is a graphite sheet; the heat dissipation element is graphite foam.
[0022] This application also provides a drone, which includes a drone body, the drone body including: a battery mounting cavity; wherein, the battery mounting cavity is used to install the battery as described in any of the above embodiments;
[0023] A fan is provided on the drone body near the battery mounting cavity, and the fan is used to draw the hot airflow in the battery mounting cavity to the external environment;
[0024] The drone body is also equipped with a control circuit board, which is electrically connected to the temperature sensor in the battery and the fan.
[0025] This application provides a battery and a drone, in which multiple battery cells are stacked to form a battery cell module. A first end of a heat transfer element is inserted between two adjacent battery cells at the middle position of the battery cell module, allowing heat from the middle cell to be transferred to the first end of the heat transfer element. Heat from the first end of the heat transfer element is then transferred to a second end, and subsequently to the battery cells at the edge of the battery cell module. This results in a uniform temperature distribution throughout the battery cell module, achieving even heat distribution. The multiple battery cells in the module share the heat, mitigating the expansion phenomenon caused by overheating.
[0026] Furthermore, at least a portion of the heat sink is attached to the heat transfer element, allowing heat from the battery cell module and the heat transfer element to be transferred to the heat sink. The heat sink is also attached to the heat sink fins of the casing, enabling heat from inside the heat sink to be transferred to the external environment through the heat sink fins, thus improving the heat exchange efficiency between the battery casing and the external environment.
[0027] The cell module utilizes heat transfer components to transfer heat from the cells in the center to those at the edges. Heat dissipation components transfer heat from the cell module and heat transfer components to the heat sink on the battery casing. The heat sink then transfers heat from the battery casing to the external environment, effectively reducing the heat in each cell within the module and mitigating the expansion caused by increased cell heat. The heat transfer components, heat dissipation components, and heat sink work together to achieve a three-stage heat conduction path for the entire battery, further improving the heat exchange efficiency of the cell module.
[0028] Of course, any product implementing this application does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.
[0030] Figure 1a This is a schematic diagram of the battery structure provided in this application;
[0031] Figure 1b for Figure 1a Exploded view of the battery shown;
[0032] Figure 1c for Figure 1a A cross-sectional view shown in the AA direction;
[0033] Figure 2a for Figure 1b A schematic diagram of the battery cell module shown from a first-view perspective;
[0034] Figure 2b for Figure 1b A schematic diagram of the battery cell module shown from a second perspective;
[0035] Figure 3a A schematic diagram of the structure of the first heat transfer element in the battery provided in this application;
[0036] Figure 3b A schematic diagram of the structure of the second type of heat transfer element in the battery provided in this application;
[0037] Figure 3c A schematic diagram of the structure of the third heat transfer element in the battery provided in this application;
[0038] Figure 4a This application provides a structural schematic diagram of a battery installed within the battery housing of a drone;
[0039] Figure 4b for Figure 4a A cross-sectional view shown in the BB direction.
[0040] Figure label:
[0041] Battery casing 1, casing heat sink 11, casing body 12, receiving cavity 121, opening 122, top cover 13;
[0042] Battery cell module 2, battery cell 21, first side 211, second side 212;
[0043] Heat dissipation component 3, heat transfer component 31, first heat transfer surface 311, second heat transfer surface 312, third heat transfer surface 313, fourth heat transfer surface 314, fifth heat transfer surface 315, sixth heat transfer surface 316, seventh heat transfer surface 317, heat dissipation component 32.
[0044] Battery mounting cavity 41, fan 42. Detailed Implementation
[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.
[0046] In existing technologies, high-rate discharge of battery modules causes a surge in heat, typically with a temperature rise rate exceeding 5°C / min. To reduce the temperature of the battery module, a traditional combination of cold and heat pipes is commonly used for heat dissipation. Specifically, a pump delivers a cooling medium to the battery through a cold pipe, while a heat pipe removes the heated medium, thus cooling the battery.
[0047] However, heat pipe cooling requires specific components and piping, which can lead to excessive battery weight. It's difficult to balance battery weight and cooling efficiency while meeting cooling requirements, thus negatively impacting the drone's flight. Furthermore, changes in drone flight attitude cause temperature fluctuations between battery cells, necessitating rapid cooling responses, which traditional cooling solutions struggle to handle thermal runaway thresholds.
[0048] Meanwhile, in existing technologies, the larger surface area of a battery cell (i.e., the side surface with the largest area) is prone to expansion. When expansion occurs, the larger surface area of the cell cannot easily make contact with the battery casing for heat transfer. Although the side surface of the cell (i.e., the surface perpendicular to the larger surface area) does not expand, the gaps between the individual cells and the vibrations generated during drone flight make it difficult for traditional thermal interface materials to dissipate heat through the side surface of the cell. This results in a significant thermal resistance between the drone's battery cell module and the battery casing.
[0049] Furthermore, existing technologies typically expose the battery casing, utilizing the downwash airflow from the propellers or the airflow from the drone's flight path to dissipate heat. However, in certain types of drones (where the battery casing is not exposed), or when the drone operates under special conditions (such as prolonged hovering without airflow), the battery module may overheat.
[0050] To address the aforementioned technical problems, this application provides a battery, such as... Figures 1a to 1c As shown, Figure 1a This is a schematic diagram of the battery structure provided in this application. Figure 1b for Figure 1a Exploded view of the battery shown. Figure 1c for Figure 1a A cross-sectional view shown in the AA direction. The battery includes: a battery casing 1, a cell module 2, and a heat dissipation assembly 3; the cell module 2 is disposed inside the battery casing 1 and includes: a plurality of cells 21 stacked sequentially; the cell 21 has two first side surfaces 211 opposite each other along the thickness direction and two second side surfaces 212 opposite each other along the width direction; the heat dissipation assembly 3 includes: a heat transfer element 31 and a heat dissipation element 32; the first end of the heat transfer element 31 is inserted between two adjacent cells 21 at the middle position of the cell module 2; the second end of the heat transfer element 31 is attached to the cell 21 at the edge position of the cell module 2; the heat transfer element 31 is used to transfer heat from the middle position of the cell module 2 to the edge position; the first side of the heat dissipation element 32 is attached to the battery casing 1, and at least a portion of the second side is attached to the heat transfer element 31, for transferring heat from the cell module 2 to the battery casing 1; a casing heat sink 11 is disposed on the battery casing 1; the casing heat sink 11 is positioned opposite to the heat dissipation element 32 and is attached to the heat dissipation element 32, for transferring heat from the heat dissipation element 32 to the external environment.
[0051] In this embodiment, multiple battery cells 21 are stacked to form a battery cell module 2. The first end of the heat transfer element 31 is inserted between two adjacent battery cells 21 at the middle position of the battery cell module 2, so that the heat of the battery cell 21 at the middle position can be transferred to the first end of the heat transfer element 31. The heat of the first end of the heat transfer element 31 is transferred to the second end of the heat transfer element 31, and then transferred to the battery cells 21 at the edge of the battery cell module 2 through the second end of the heat transfer element 31, so that the temperature distribution of the battery cell module 2 is uniform, achieving uniform heat distribution of the battery cell module 2. The multiple battery cells 21 in the battery cell module 2 share the heat, improving the expansion phenomenon caused by overheating of the battery cells 21.
[0052] Furthermore, at least a portion of the heat sink 32 is attached to the heat transfer element 31, allowing the heat from the battery cell module 2 and the heat transfer element 31 to be transferred to the heat sink 32. The heat sink 32 is attached to the heat sink 11 of the housing, enabling the heat inside the heat sink 32 to be transferred to the external environment through the heat sink 11 of the housing, thereby improving the heat exchange efficiency between the inside of the battery housing 1 and the external environment.
[0053] The cell module 2 uses the heat transfer component 31 to transfer heat from the cells 21 in the middle to those at the edges. The heat dissipation component 32 transfers the heat from the cell module 2 and the heat transfer component 31 to the heat sink 11 on the battery casing 1. The heat sink 11 then transfers the heat from the battery casing 1 to the external environment, effectively reducing the heat of each cell 21 in the cell module 2 and mitigating the expansion caused by the increased heat in the cells 21. The heat transfer component 31, the heat dissipation component 32, and the heat sink 11 work together to achieve a three-level heat conduction path for the entire battery, further improving the heat exchange efficiency of the cell module 2.
[0054] In this embodiment, the heat sink 11 and the battery casing 1 can be an integral in-mold injection molded part. The material of the heat sink 11 can also be a metal material.
[0055] Simultaneously, the heat transfer component 31 transfers the temperature of the cell 21 in the middle position to the cell 21 at the edge position, achieving uniform heat distribution. The heat dissipation component 32 transfers the temperature of the cell module 2 to the battery housing 1. The housing heat sink 11 transfers the heat of the battery housing 1 to the external environment. The heat transfer component 31, the heat dissipation component 32, and the housing heat sink 11 work together to form a directional heat flow channel, realizing a three-level heat conduction path for heat. The heat dissipation method of the three components enables the UAV to operate in an ambient temperature range of -20℃ to 50℃, ensuring that the highest hot spot temperature of the cell 21 in the cell module 2 is less than the allowable surface temperature of the cell, which is 70℃, thus improving the environmental adaptability of the battery. Furthermore, the combined cooling of the three components results in a temperature rise rate of less than 2℃ / min under peak operating conditions for the cell module 2. Compared to the temperature rise rate of 5℃ / min in the prior art, the temperature rise rate of the cell module 2 in this embodiment is significantly reduced. Furthermore, the total weight of the heat transfer component 31, the heat dissipation component 32, and the heat sink 11 is less than 5% of the battery weight. Compared with the traditional aluminum alloy heat conduction solution, which has a total weight ratio of more than 15% of the battery weight, the battery weight provided in this embodiment is significantly reduced.
[0056] Specifically, the heat transfer element 31 has multiple heat transfer surfaces. The first heat transfer surface 311 is inserted between the first side surfaces 211 of two adjacent cells 21 at the middle position of the cell module 2. The second heat transfer surface 312 is attached to the first side surface 211 of the cell 21 at the edge position of the cell module 2. The third heat transfer surface 313 is covered on the second side surface 212 of the cell 21 located between the first heat transfer surface 311 and the second heat transfer surface 312. The first heat transfer surface 311 and the second heat transfer surface 312 are respectively connected to the two ends of the third heat transfer surface 313. The heat transfer element 31 is used to transfer the heat of the cell 21 at the middle position to the cell 21 at the edge position.
[0057] In this embodiment, the first heat transfer surface 311 of the heat transfer element 31 extends between the first side surfaces 211 of two adjacent cells 21 at the middle position, and the second heat transfer surface 312 is attached to the first side surface 211 of the cell 21 located at the edge position, so that the heat of the cell 21 at the middle position can be transferred to the cell 21 at the edge position, thereby achieving uniform heat distribution in the cell module 2. Compared with the traditional heat dissipation scheme where the maximum temperature difference between the cells 21 in the cell module 2 is greater than 8°C, in this embodiment, the maximum temperature difference between the cells 21 in the cell module 2 is less than 2°C.
[0058] The specific heat transfer process is as follows: heat from the battery cell 21 located in the middle position is transferred to the first heat transfer surface 311 located in the middle position of the battery cell module 2. The heat from the first heat transfer surface 311 is transferred through the third heat transfer surface 313 to the second heat transfer surface 312 located at the edge position of the battery cell module 2. The second heat transfer surface 312 then transfers the heat to the battery cell 21 located at the edge position. By using the heat transfer component 31 to transfer the heat from the battery cell 21 located in the middle position of the battery cell module 2 to the battery cell 21 located at the edge position of the battery cell module 2, a uniform heat distribution effect among multiple battery cells 21 can be achieved. The multiple battery cells 21 in the battery cell module 2 share the heat, improving the expansion phenomenon caused by overheating of the battery cell 21.
[0059] Furthermore, the first heat transfer surface 311 and the second heat transfer surface 312 of the heat transfer element 31 are attached to the first side surface 211 of the battery cell 21, and the third heat transfer surface 313 is disposed on the second side surface 212 of the battery cell 21 located between the first heat transfer surface 311 and the second heat transfer surface 312. When the battery cell 21 expands, the heat transfer element 31 can deform along with the bulging of the battery cell 21 to adapt to the expansion of the battery cell 21, thereby avoiding the amplification of temperature difference caused by local contact failure.
[0060] The heat sink 32 has its first side attached to the battery casing 1 and at least part of its second side attached to the third heat transfer surface 313, for transferring the heat of the battery cell module 2 to the external environment.
[0061] In this embodiment, the heat sink 32 is typically located inside the battery casing 1. The heat sink 32 in the heat dissipation assembly 3 can assist the battery cell module 2 in transferring heat to the external environment, effectively improving the heat dissipation efficiency of the battery cell module 2 and further reducing the expansion phenomenon caused by overheating of the battery cell 21. The weight of the heat transfer component 31 and the heat sink 32 is less than the weight of the equipment with heat pipe and pump body in the prior art.
[0062] In some embodiments of this application, the heat transfer element 31 is a graphite sheet; the heat dissipation element 32 is graphite foam. Graphite has high thermal conductivity, which can effectively improve the heat dissipation effect of the battery module 2. Using graphite sheets as the material of the heat transfer element 31, due to the good toughness of graphite, can be made into thin sheets with a small thickness, further reducing the weight of the heat transfer element 31.
[0063] Graphite foam has a compression resilience greater than 60%, enabling it to withstand high-frequency vibrations during drone flight. Using graphite foam as the material for the heat sink 32 ensures that it does not peel off under vibrations below 2000Hz. Simultaneously, the graphite foam heat sink 32 fills the space between the second side 212 of the battery cell 21 in the battery cell module 2 and the battery casing 1, absorbing vibrations and impacts between the battery casing 1 and the battery cell module 2 during drone flight, thus preventing damage to the heat sink interface caused by vibration and impact. Therefore, the battery in this embodiment is adaptable to dynamic operating conditions, enhancing the overall structural reliability and environmental adaptability of the battery.
[0064] In existing technologies, thermal grease, thermal gel, or thermal pads are typically placed between the cell module and the battery casing, resulting in a cumbersome assembly process that consumes a significant amount of assembly time. In this embodiment, graphite foam is used as the heat sink 32. During assembly, the graphite foam heat sink 32 is first attached to the second side 212 of the cell 21, and then the cell module 2 and the heat sink 32 attached to the cell module 2 are inserted into the battery casing 1, completing the assembly and reducing assembly time by 50%.
[0065] In some implementations of this application, such as Figure 2a , Figure 2b and Figure 3a As shown, Figure 2a for Figure 1b The diagram shows a first-view structural schematic of the battery cell module. Figure 2b for Figure 1b The diagram shows a second-view structural schematic of the battery cell module. Figure 3a This is a schematic diagram of the structure of the first type of heat transfer element in the battery provided in this application. There are multiple heat transfer elements 31, which are staggered in the stacking direction. A first heat transfer surface 311, a second heat transfer surface 312, and a third heat transfer surface 313 form a C-shaped structure. One heat transfer element 31 covers the battery cell 21 located from the top to the middle position in the battery cell module 2; another heat transfer element 31 covers the battery cell 21 located from the bottom to the middle position in the battery cell module 2. The first heat transfer surfaces 311 of both heat transfer elements 31 are inserted between the first side surfaces 211 of two adjacent battery cells 21 at the middle position; the second heat transfer surfaces 312 of both heat transfer elements 31 cover the first side surfaces 211 of the battery cells 21 located at the top and bottom, respectively; the third heat transfer surfaces 313 of both heat transfer elements 31 cover the opposing second side surfaces 212 of the multiple battery cells 21.
[0066] Specifically, the first heat transfer surface 311, the second heat transfer surface 312, and the third heat transfer surface 313 form a C-shaped structure; one heat transfer element 31 covers the battery cell 21 located from the top to the middle position in the battery cell module 2; the first heat transfer surface 311 of the heat transfer element 31 extends between two adjacent battery cells 21 in the middle position of the battery cell module 2; the second heat transfer surface 312 is attached to the first side 211 of the battery cell 21 located at the top position in the battery cell module 2; another heat transfer element 31 covers the battery cell 21 located from the bottom to the middle position in the battery cell module 2; the first heat transfer surface 311 of the heat transfer element 31 extends between two adjacent battery cells 21 in the middle position of the battery cell module 2; the second heat transfer surface 312 is attached to the first side 211 of the battery cell 21 located at the bottom position in the battery cell module 2; the third heat transfer surfaces 313 of the two heat transfer elements 31 respectively cover the opposite sides of the plurality of battery cells 21.
[0067] In this embodiment, when there are two heat transfer elements 31, the two heat transfer elements 31 can be located on opposite sides of the cell module 2, that is, the third heat transfer surfaces 313 of the two heat transfer elements 31 are arranged opposite each other along the width direction of the cell module 2. One heat transfer element 31 transfers the heat from the middle cell 21 to the cell 21 located at the top of the cell module 2, and the other heat transfer element 31 transfers the heat from the middle cell 21 to the cell 21 located at the bottom of the cell module 2. In this way, the temperature uniformity of the cell module 2 can be further improved.
[0068] In actual production, the two heat transfer elements 31 can also be placed on the same side of the battery cell module 2.
[0069] When the first heat transfer surface 311, the second heat transfer surface 312, and the third heat transfer surface 313 of the heat transfer element 31 form a C-shaped structure and the two heat transfer elements are located on both sides of the cell module 2, the first heat transfer surface 311 of the two heat transfer elements 31 can be located on the first side surface 211 on both sides of the same cell 21 and between the adjacent cell 21. Alternatively, the first heat transfer surface 311 of the two heat transfer elements 31 can be located on the same first side surface 211 of the same cell 21 and between the adjacent cell 21.
[0070] In some embodiments of this application, the area of the heat sink 32 can be adjusted according to actual needs. For example... Figure 2a and Figure 2b As shown. The number of heat sinks 32 is the same as the number of heat transfer elements 31, and they are arranged in a one-to-one correspondence with the heat transfer elements 31; a portion of the second side of each heat sink 32 is attached to the third heat transfer surface 313, and another portion is attached to the second side 212 of the battery cell 21 that is not covered by the third heat transfer surface 313.
[0071] In this embodiment, the area of the heat sink 32 can be larger than the third heat transfer surface 313. At this time, part of the heat sink 32 covers the third heat transfer surface 313, and another part covers the second side 212 of the battery cell 21 that is not covered by the third heat transfer surface 313.
[0072] Alternatively, the area of the heat sink 32 can be adjusted so that it only covers the third heat transfer surface 313 of the heat transfer component 31, or only covers the second side 212 of the battery cell. As long as the heat of the battery cell module 2 can be transferred to the battery casing 1, no further restrictions are imposed here.
[0073] In some implementations of this application, such as Figure 3b As shown, Figure 3b This is a schematic diagram of the structure of the second type of heat transfer element in the battery provided in this application. Each heat transfer element 31 also has: at least one fourth heat transfer surface 314; the fourth heat transfer surface 314 is located between the first heat transfer surface 311 and the second heat transfer surface 312, connected to the third heat transfer surface 313, and extends into the space between adjacent cells 21.
[0074] In this embodiment, at least one fourth heat transfer surface 314 is also provided on the first heat transfer surface 311 and the second heat transfer surface 312. The fourth heat transfer surface 314 extends between the first side surface 211 of each two adjacent battery cells 21, thereby further improving the heat dissipation capability of the battery cell module 2.
[0075] In some implementations of this application, such as Figure 3c As shown, Figure 3c This is a schematic diagram of the structure of the third type of heat transfer element in the battery provided in this application. The heat transfer element 31 may include, among its multiple heat transfer surfaces, two opposing fifth heat transfer surfaces 315, two opposing sixth heat transfer surfaces 316, and at least one seventh heat transfer surface 317; the two fifth heat transfer surfaces 315 and the two sixth heat transfer surfaces 316 form a U-shaped structure. The heat transfer element 31 is sleeved on the outside of the cell module 2, wherein the two fifth heat transfer surfaces 315 are respectively attached to the first side surfaces 211 of the two cells 21 located at the top and bottom of the cell module 2, the two sixth heat transfer surfaces 316 respectively cover the two second side surfaces 212 of the cell 21 between the two fifth heat transfer surfaces 315, and at least one seventh heat transfer surface 317 extends into the space between the first side surfaces 211 of adjacent cells. This heat transfer element 31 can transfer heat from the cell 21 at the middle position to the cell 21 at the edge position, thereby achieving uniform heat distribution in the cell module 2.
[0076] In some embodiments of this application, a PI (Polyimide) heating film can be covered on the inner side of the heat sink 11 of the casing to take into account the low-temperature heating performance of the battery.
[0077] In some embodiments of this application, a temperature sensor is provided between the battery cells 21; the temperature sensor is used to detect the temperature of the battery cell module 2. The temperature of the battery cell module 2 can be detected by the temperature sensor, thereby achieving dynamic control of the temperature of the battery cells 21.
[0078] In some implementations of this application, such as Figure 1a and Figure 1b As shown. The battery housing 1 includes a housing body 12 and a top cover 13. The housing body 12 has a receiving cavity 121 and an opening 122. The battery cell module 2 and the heat dissipation assembly 3 are installed in the receiving cavity 121 through the opening 122. The top cover 13 is detachably closed at the opening 122 of the housing body 12, and a waterproof gasket is provided at the connection between the housing body 12 and the top cover 13.
[0079] In this embodiment, the battery cell module 2 and the heat dissipation assembly 3 are installed in the receiving cavity 121 through the opening 122 of the housing body 12, and the top cover 13 is closed to the opening 122 to protect the battery cell module 2 and the heat dissipation assembly 3. Simultaneously, a waterproof gasket can be provided at the connection between the housing body 12 and the top cover 13 to prevent moisture or dust from the external environment from entering the receiving cavity 121 and adversely affecting the battery cell module 2 and the heat dissipation assembly 3. Using a waterproof gasket for dust and water protection enables the overall dust and water resistance rating of the battery to reach IP67, which is superior to the IP54 rating of traditional air-cooled solutions.
[0080] This application also provides a drone, such as Figure 4a and Figure 4b As shown, Figure 4a This application provides a structural schematic diagram of a battery installed within a battery housing cavity of a drone. Figure 4b for Figure 4a A cross-sectional view shown in the BB direction. The drone includes a drone body, which includes a battery mounting cavity 41; wherein the battery mounting cavity 41 is used to install the battery of any of the above embodiments; a fan 42 is provided on the drone body near the battery mounting cavity 41, and the fan 42 is used to draw the hot air from the battery mounting cavity 41 to the external environment; a control circuit board is also installed on the drone body, and the control circuit board is electrically connected to the temperature sensor in the battery and the fan 42 respectively.
[0081] In this embodiment, the battery transfers heat to the battery mounting cavity 41 through the heat-conducting component 31, the heat dissipation component 32, and the housing heat sink 11. The fan 42 then draws the hot airflow from the battery mounting cavity 41 to the external environment, further improving the heat dissipation efficiency of the battery cell module 2 and thus mitigating the expansion phenomenon of the cell 21. In some embodiments, the control circuit board can be electrically connected to the temperature sensor in the battery and the fan 42 respectively, and the fan speed and start / stop can be controlled in real time according to the temperature of the cell module 2.
[0082] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.
Claims
1. A battery, characterized by, include: Battery casing (1), cell module (2), and heat dissipation assembly (3); The battery cell module (2) is disposed inside the battery casing (1) and includes: a plurality of battery cells (21) stacked in sequence; the battery cell (21) has two first side surfaces (211) opposite each other along the thickness direction and two second side surfaces (212) opposite each other along the width direction; The heat dissipation component (3) includes a heat transfer element (31) and a heat dissipation element (32); the first end of the heat transfer element (31) is inserted between two adjacent cells (21) at the middle position of the cell module (2); the second end of the heat transfer element (31) is attached to the cell (21) at the edge position of the cell module (2); the heat transfer element (31) is used to transfer the heat at the middle position of the cell module (2) to the edge position; The first side of the heat sink (32) is attached to the battery housing (1), and at least part of the second side is attached to the heat transfer element (31) for transferring the heat of the cell module (2) to the battery housing (1). The battery casing (1) is provided with a casing heat sink (11); the casing heat sink (11) is positioned opposite to the heat sink (32) and is attached to the heat sink (32) to transfer the heat of the heat sink (32) to the external environment.
2. The battery according to claim 1, characterized in that, The heat transfer element (31) has multiple heat transfer surfaces. The first heat transfer surface (311) of the multiple heat transfer surfaces is inserted between the first side surfaces (211) of two adjacent cells (21) at the middle position of the cell module (2). The second heat transfer surface (312) is attached to the first side surface (211) of the cell (21) at the edge position of the cell module (2). The third heat transfer surface (313) is covered on the second side surface (212) of the cell (21) located between the first heat transfer surface (311) and the second heat transfer surface (312). The first heat transfer surface (311) and the second heat transfer surface (312) are respectively connected to the two ends of the third heat transfer surface (313). The heat transfer element (31) is used to transfer the heat of the cell (21) at the middle position to the cell (21) at the edge position.
3. The battery according to claim 2, characterized in that, The number of heat transfer elements (31) is multiple, and the multiple heat transfer elements (31) are staggered in the stacking direction.
4. The battery of claim 3, wherein, The first heat transfer surface (311), the second heat transfer surface (312), and the third heat transfer surface (313) form a C-shaped structure; One of the heat transfer elements (31) covers the battery cell (21) located from the top to the middle position in the battery cell module (2); the other heat transfer element (31) covers the battery cell (21) located from the bottom to the middle position in the battery cell module (2); The first heat transfer surfaces (311) of the two heat transfer elements (31) are inserted between the first side surfaces (211) of the two adjacent cells (21) at the middle position; The second heat transfer surfaces (312) of the two heat transfer elements (31) respectively cover the first side surfaces (211) of the battery cell (21) located at the top and bottom; The third heat transfer surface (313) of the two heat transfer elements (31) respectively covers the opposite second side surface (212) of the plurality of cells (21).
5. The battery according to claim 4, characterized in that, The number of heat sinks (32) is the same as the number of heat transfer elements (31), and they are arranged in a one-to-one correspondence with the heat transfer elements (31); a portion of the second side of each heat sink (32) is attached to the third heat transfer surface (313), and another portion is attached to the second side (212) of the battery cell (21) that is not covered by the third heat transfer surface (313).
6. The battery according to claim 4, characterized in that, Each of the heat transfer elements (31) further comprises: at least one fourth heat transfer surface (314); the fourth heat transfer surface (314) is located between the first heat transfer surface (311) and the second heat transfer surface (312), connected to the third heat transfer surface (313), and extends into the space between adjacent cells (21).
7. The battery of claim 1, wherein, Also includes: A temperature sensor is provided between the battery cells (21); the temperature sensor is used to detect the temperature of the battery cell module (2).
8. The battery according to claim 1, characterized in that, The battery housing (1) includes a housing body (12) and a top cover (13). The housing body (12) has a receiving cavity (121) and an opening (122). The battery cell module (2) and the heat dissipation assembly (3) are installed in the receiving cavity (121) through the opening (122). The top cover (13) is detachably closed at the opening (122) of the housing body (12), and a waterproof gasket is provided at the connection between the housing body (12) and the top cover (13).
9. The battery according to any one of claims 1-8, characterized in that, The heat transfer element (31) is a graphite sheet; the heat dissipation element (32) is graphite foam.
10. A drone, characterized in that, The device includes a drone body, the drone body comprising: a battery mounting cavity (41); wherein the battery mounting cavity (41) is used to mount the battery as described in any one of claims 1-9; A fan (42) is provided near the battery mounting cavity (41) of the drone body. The fan (42) is used to draw the hot airflow in the battery mounting cavity (41) to the external environment. The drone body is also equipped with a control circuit board, which is electrically connected to the temperature sensor in the battery and the fan (42).